Process of preserving wood.



KARL LOUIS FELIX IBZEDEMANN, 0F STOCKHOLM, SWEDEN.

PBGCESS 0F PRESERVING WOGLD.

No Brawing. Griginal application filed May 13, 1910, Serial No 581,172.

filed June 14, 1911.

all whom it 17 conwrn: ie

of nnol'lie; process of preserving Wood bed n to U. S. i aionl: DQ151802 of vo joint inventors. Tne presen ta )DllCdlllOll IS a. (llVISlOIl ol- V niv l). S1 patent application Sorrel no. "Q v 1910. llSCTlbLl in the U. E an n ieyer of col-bonnie of lime iorinccl in me out-er layers of the woocl. which prevents in a. certain degree washing o1 djlll (ll?COIDPOSltlOD. of the impregnating on stance.

ilie object oi the present invention is to lOVlflB 2. more reliable protection against 1 1 ing out and decomposition of the inio'rit'no' substance than lint afforded by c n i L we lay r of carbonate of lime alone.

The invention consists impregnation Wood with solutions of combinations or phenols with alkaline earths and an oil in enmlsion with said solutions.

The invention may be carried into prootiee for instance in the following manner. The WOOCl is placed in 21- usual impregnation (6 l or apparatus in Whioh is infrocln ceclfor instance a water solution of calcium oresate and an oil for instance creosote oil in emulsion therewith. The salt solution may o0ntain about 4-591; of calcium cresnte and to each cubic foot of Wood may be employed about one and one-third gallons of the solution. The quantity of oil in relation to tlie quantity of salt solution may be chosen at iled to me and "vl ei'llier Specification of Letters Patent.

Patented @ot. iii ii-i110 Divided and this application Serial No. 633.135.

will. Generally it is suitable to use 1 volume of oil on 3 volumes of the salt SCliLllOIi. The mixture of salt solution anti oil. may be forced into the wood in the usual manner by pressure. Inasmuch as the sol-i solution permeates the pores of file W006i easier than the oil, tho latter will so to say be filtered from the salt solution. ilio outer layers of the Wood in which th *5 is (AlJl'illl'MWl an oil layer which retains the sfiliin the Wood illlll also protects the some from chemical :lliTGl'il- {oils such as oxidation and decomposition. l'llien inc Wood thus impregnmied :posexl to the influence of the atmospheric air tho phenols in the outermost layers of l-lie WOfXl will gradually be freed by the carbonic acid contained in the air. Tho carbonate of lime formed thereby eonstiiuies :1 further protection against washing out and ileci'nnposil ion of the calcium oresnljc in the inner parts of the 'WUOL'l.

I 21111 aware tlnilt it has been proposell to use mixtures of an oil and one or more proserving substances such as sulfate of copper, slzikod lime, and so on for preserving \VOU Ll and I therefore do not claim the use oi on oil in connection with another preserving; substance broadly but What- I claim is:

The process of preserving wood which consists in impregnating the wood with: solutions of cmnbinations of phenols with alkaline earths and an oil in emulsion with said solutions, substantially as and for 'l'lio purpose set forth.

In testimony that l claim the foregoil'lg as my invention, 1 have signed my name in.

presence of two subscribing witnesses.

KARL LOUIS FELIX FRIEDEMANN Viitnesses CHARLES Sonnimn, ELLEN Fonczo. 

